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发明名称
Improvements relating to devices for the recording of sounds on sound films
摘要
申请公布号
GB371774(A)
申请公布日期
1932.04.28
申请号
GB19310032434
申请日期
1931.11.23
申请人
FRANCISQUE AUGUSTE ROGER DE PALMA
发明人
分类号
G11B7/00
主分类号
G11B7/00
代理机构
代理人
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